Press device of multi cam type

ABSTRACT

A multi-directional multi-cam press device may include a cam base fixed to the lower mold, a first cam slide provided to slide forwards and backwards along a first direction of the cam base, at least a first punch unit provided in the first cam slide along a first direction, a cam drive fixed to an upper mold configured of moving in a vertical direction with respect to the lower mold, and making cam contact with the first cam slide, a second cam slide provided in the cam drive to move forwards and backwards in a second direction perpendicular to the first direction and in contact with the cam base side, and at least a second punch unit provided on the second cam slide along a second direction.

CROSS-REFERENCE TO RELATED APPLICATION

The present application claims priority to Korean Patent Application No.10-2020-0081269 filed on Jul. 2, 2020, the entire contents of which isincorporated herein for all purposes by this reference.

BACKGROUND OF THE INVENTION Field of the Invention

The present invention relates a press device. More particularly, thepresent invention relates to a multi-directional multi-cam press devicefor piercing panel materials on the vehicle body sub-assembly line.

Description of Related Art

In general, to produce one finished body panel, it has to go throughseveral press forming processes. Among these press forming processes,there is a piercing process in which a hole is made in a panel material.

The piercing process is performed by a cam-type piercing press devicethat forms a piercing hole in a side surface of a panel material usingan inclined cam structure. The cam type piercing press device isprovided on one side of a press mold for press processing a panelmaterial as a workpiece.

Recently, a multi-directional multi-cam type piercing press device hasbeen developed in which piercing operations are performed in differentdirections within a narrow structural space of a press mold.

In the multi-directional multi-cam type piercing press device, one camdrive is configured in the upper mold of the press mold, and a pluralityof cam slides are configured in the lower mold of the press mold.Accordingly, the cam drive moves the cam slides in different directions,and the panel material may be pierced in different directions throughthe pierce punch coupled to the cam slides.

However, conventionally, as the cam slides are configured in the lowermold, it is difficult to secure a space in the press mold. Furthermore,when returning the cam slides is completed, it is necessary to extendthe driving distance of the cam slides to avoid interference due to theextraction of the panel material. However, the extension of the drivingdistance of the cam slides may cause mutual interference when the camslides return.

The information disclosed in this Background of the Invention section isonly for enhancement of understanding of the general background of theinvention and may not be taken as an acknowledgement or any form ofsuggestion that this information forms the prior art already known to aperson skilled in the art.

BRIEF SUMMARY

Various aspects of the present invention are directed to providing amulti-directional multi-cam press device configured for piercing indifferent directions by driving a single cam within the narrowstructural space of the press mold.

A multi-directional multi-cam press device according to variousexemplary embodiments of the present invention includes a cam base fixedto the lower mold, a first cam slide provided to slide forwards andbackwards along a first direction of the cam base, at least a firstpunch unit provided in the first cam slide along a first direction, acam drive fixed to an upper mold configured of moving in a verticaldirection with respect to the lower mold, and making cam contact withthe first cam slide, a second cam slide provided in the cam drive tomove forwards and backwards in a second direction perpendicular to thefirst direction and in contact with the cam base side, and at least asecond punch unit provided on the second cam slide along the seconddirection thereof.

Furthermore, the multi-directional multi-cam press device according tovarious exemplary embodiments of the present invention may furtherinclude a return spring unit connected to the cam base and the first camslide in the first direction thereof.

Furthermore, in the multi-directional multi-cam press device accordingto various exemplary embodiments of the present invention, the returnspring unit may include a gas spring.

Furthermore, the multi-directional multi-cam press device according tovarious exemplary embodiments of the present invention may furtherinclude a return stopper provided on the cam base corresponding to thefirst cam slide and configured to limit a return position of the firstcam slide.

Furthermore, in the multi-directional multi-cam press device accordingto various exemplary embodiments of the present invention, the cam basemay include at least one main rail block which is mounted to be inclineddownwardly from a rear side to a front side through the base inclinedsurface as an upper surface, and is slidably coupled with the first camslide.

Furthermore, in the multi-directional multi-cam press device accordingto various exemplary embodiments of the present invention the cam basemay include a pair of sub-rail blocks provided on the inclined surfaceof the base with the main rail block interposed therebetween, andslidably coupled with the first cam slide.

Furthermore, in the multi-directional multi-cam press device accordingto various exemplary embodiments of the present invention, the first camslide may include at least one driven cam plate disposed to be inclineddownwardly from a front to a rear corresponding to the cam drive.

Furthermore, in the multi-directional multi-cam press device accordingto various exemplary embodiments of the present invention, the first camslide may include a first guide plate fixed on one side surface andanother side surface thereof and provided to be in surface-contact witha first guide block provided on both sides of the cam base.

Furthermore, in the multi-directional multi-cam press device accordingto various exemplary embodiments of the present invention, the first camslide may include a first return support block fixed on at least oneside thereof and slidably coupled to the cam drive.

Furthermore, in the multi-directional multi-cam press device accordingto various exemplary embodiments of the present invention, the cam drivemay include a second return support block provided on a side surfacecorresponding to the first return support block and slidably coupledwith the first return support block.

Furthermore, in the multi-directional multi-cam press device accordingto various exemplary embodiments of the present invention, the cam drivemay include a driving cam plate configured to be in cam contact with thedriven cam plate.

Furthermore, in the multi-directional multi-cam press device accordingto various exemplary embodiments of the present invention, the cam drivemay include a second guide plate provided on a rear surface thereof andprovided in surface-contact with a second guide block provided on a rearside of the cam base.

Furthermore, in the multi-directional multi-cam press device accordingto various exemplary embodiments of the present invention, the cam drivemay include a guide rail member which is configured to be inclineddownwardly from one side to another side along a second direction fromthe rear side and slidably couples with the second cam slide.

Furthermore, in the multi-directional multi-cam press device accordingto various exemplary embodiments of the present invention, the guiderail member may include a fixed end portion formed at one end portionand at another end portion of the guide rail member and fixed to a firstside and a second side of the cam drive, respectively, and a guidestopper formed at the fixed end portion of the one end portion andlimiting a forward position of the second cam slide.

Furthermore, in the multi-directional multi-cam press device accordingto various exemplary embodiments of the present invention, the secondcam slide may have an engaging hole slidably coupled with the guide railmember, and slide between the fixed end portions along the guide railmember.

Furthermore, the multi-directional multi-cam press device according tovarious exemplary embodiments of the present invention may furtherinclude a cam block provided on a base horizontal surface of an uppersurface of the cam base, having a cam inclined surface inclineddownwardly in an advance direction of the second cam slide, and slidablycoupled to a lower surface of the second cam slide.

Furthermore, in the multi-directional multi-cam press device accordingto various exemplary embodiments of the present invention, on the lowersurface of the second cam slide, a cam groove for cam contacting withthe cam block may be formed.

Furthermore, in the multi-directional multi-cam press device accordingto various exemplary embodiments of the present invention, a guidegroove may be formed in the cam block along a second direction thereof.

Furthermore, in the multi-directional multi-cam press device accordingto various exemplary embodiments of the present invention, a guideprotrusion slidably coupled to the guide groove may be provided at alower portion of the second cam slide.

Furthermore, in the multi-directional multi-cam press device accordingto various exemplary embodiments of the present invention, the first andsecond punch units may include a pierce tool for piercing a panelmaterial.

According to the exemplary embodiments of the present invention, sincepiercing processing in different directions is possible even within thenarrow structural space of the press mold without process division, thespace constraint condition of the press mold may be overcome, and themold manufacturing cost and process time may be shortened.

Furthermore, effects which may be obtained or predicted by the exemplaryembodiments of the present invention will be included directly orimplicitly in the detailed description of the exemplary embodiments ofthe present invention. That is, various effects predicted according tovarious exemplary embodiments of the present invention will be includedwithin a detailed description to be described later.

The methods and apparatuses of the present invention have other featuresand advantages which will be apparent from or are set forth in moredetail in the accompanying drawings, which are incorporated herein, andthe following Detailed Description, which together serve to explaincertain principles of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 and FIG. 2 are perspective views illustrating a multi-directionalmulti-cam type press device according to various exemplary embodimentsof the present invention.

FIG. 3A and FIG. 3B are side schematic diagrams illustrating amulti-directional multi-cam type press device according to variousexemplary embodiments of the present invention.

FIG. 4 is a cross-sectional view exemplarily illustrating amulti-directional multi-cam type press device according to variousexemplary embodiments of the present invention in a first directionthereof.

FIG. 5 is a cross-sectional view exemplarily illustrating amulti-directional multi-cam type press device according to variousexemplary embodiments of the present invention in a second directionthereof.

FIG. 6 and FIG. 7A and FIG. 7B are diagrams illustrating a sliding andguide structure of a first cam slide applied to a multi-directionalmulti-cam type press device according to various exemplary embodimentsof the present invention.

FIG. 8 is a view showing a return spring unit applied to amulti-directional multi-cam type press device according to variousexemplary embodiments of the present invention.

FIG. 9 is a view showing a return stopper applied to a multi-directionalmulti-cam press device according to various exemplary embodiments of thepresent invention.

FIG. 10A and FIG. 10B are diagrams illustrating a guide structure of acam drive applied to a multi-directional multi-cam press deviceaccording to various exemplary embodiments of the present invention.

FIG. 11 is a diagram illustrating a guide structure of a second camslide applied to a cam drive applied to a multi-directional multi-campress device according to various exemplary embodiments of the presentinvention.

FIG. 12A and FIG. 12B are views showing a guide structure of a cam blockand a second cam slide applied to a multi-directional multi-cam typepress device according to various exemplary embodiments of the presentinvention.

FIG. 13 and FIG. 14 are views for explaining the operation of themulti-directional multi-cam type press device according to variousexemplary embodiments of the present invention.

It may be understood that the appended drawings are not necessarily toscale, presenting a somewhat simplified representation of variousfeatures illustrative of the basic principles of the present invention.The specific design features of the present invention as includedherein, including, for example, specific dimensions, orientations,locations, and shapes will be determined in part by the particularlyintended application and use environment.

In the figures, reference numbers refer to the same or equivalentportions of the present invention throughout the several figures of thedrawing.

DETAILED DESCRIPTION

Reference will now be made in detail to various embodiments of thepresent invention(s), examples of which are illustrated in theaccompanying drawings and described below. While the presentinvention(s) will be described in conjunction with exemplary embodimentsof the present invention, it will be understood that the presentdescription is not intended to limit the present invention(s) to thoseexemplary embodiments. On the other hand, the present invention(s)is/are intended to cover not only the exemplary embodiments of thepresent invention, but also various alternatives, modifications,equivalents and other embodiments, which may be included within thespirit and scope of the present invention as defined by the appendedclaims.

Exemplary embodiments of the present application will be described morefully hereinafter with reference to the accompanying drawings, in whichexemplary embodiments of the present invention are shown. As thoseskilled in the art would realize, the described embodiments may bemodified in various different ways, all without departing from thespirit or scope of the present invention.

The drawings and description are to be regarded as illustrative innature and not restrictive. Like reference numerals designate likeelements throughout the specification.

Furthermore, the size and thickness of each component shown in thedrawings are arbitrarily shown for understanding and ease ofdescription, but the present invention is not limited thereto, and thethickness of parts, regions, etc., are exaggerated for clarity.

In a detailed description, to distinguish the same constituent elements,a first and a second, etc., are used as names of constituent elementsand do not represent the order.

Furthermore, in the entire specification, unless explicitly described tothe contrary, the word “comprise” and variations such as “comprises” or“comprising”, will be understood to imply the inclusion of statedelements but not the exclusion of any other elements.

Furthermore, the terms “unit”, “means”, “portion”, and “member”described in the specification indicate a unit of a comprehensiveconstituent element for performing at least one function and operation.

FIG. 1 and FIG. 2 are perspective views illustrating a multi-directionalmulti-cam type press device according to various exemplary embodimentsof the present invention, and FIG. 3A and FIG. 3B are side schematicdiagrams illustrating a multi-directional multi-cam type press deviceaccording to various exemplary embodiments of the present invention.

Referring to FIG. 1 to FIG. 3B, the multi-directional multi-cam pressdevice 100 according to various exemplary embodiments of the presentinvention may be applied to a sub-assembly line of a body factory thatprocesses body portions such as body panels that are assembled on a bodythrough several press forming processes.

In the above-described sub assembly line, in addition to the drawmolding process of press-forming the vehicle body panel into a setshape, a trim process, a piercing process, a flange banding process anda forming process are performed.

Hereinafter, an example of processing a piercing hole in a set portionof the panel material 1 using the multi-directional multi-cam pressdevice 100 according to various exemplary embodiments of the presentinvention will be described.

The multi-directional multi-cam press device 100 according to variousexemplary embodiments of the present invention may be configured on oneside of a press mold system for press-forming the panel material 1 intoa set shape.

This press mold system includes a lower mold 3 as a lower die or a fixeddie and an upper mold 5 as an upper die or a movable die. In the above,the upper mold 5 is provided to be movable in the vertical directionwith respect to the lower mold 3.

Hereinafter, based on the vertical direction, the front-rear directionis set as the first direction, and the left and right directionperpendicular to the first direction is set as the second directionthereof.

Furthermore, the end portion (one/one end portion or the other/one end)in the following may be defined as either end, and it may be defined asa certain portion (one/one end portion or the other/one end) includingthe end portion.

The multi-directional multi-cam press device 100 according to variousexemplary embodiments of the present invention has a structureconfigured for piercing in different directions by driving a single camwithin a narrow structural space of a press mold.

FIG. 4 is a cross-sectional view exemplarily illustrating amulti-directional multi-cam type press device according to variousexemplary embodiments of the present invention in a first directionthereof, and FIG. 5 is a cross-sectional view exemplarily illustrating amulti-directional multi-cam type press device according to variousexemplary embodiments of the present invention in a second directionthereof.

Referring to FIG. 1 to FIG. 5, the multi-directional multi-cam pressdevice 100 according to various exemplary embodiments of the presentinvention basically includes a cam base 110, a first cam slide 210, areturn spring unit 310, and a return stopper 410, a first punch unit510, a cam drive 610, a second cam slide 710, a second punch unit 810,and a cam block 910.

In various exemplary embodiments of the present invention, the cam base110 is provided to be fixed to the lower mold 3 corresponding to the setportion of the panel material 1 for processing the piercing hole.

The cam base 110 has a base inclined surface 111 inclined downwardlyfrom a rear side to a front side along a set first direction (a forwardand backward direction, arrow A in the drawing) on an upper surface.

Furthermore, a base horizontal plane 113 is formed on the upper surfaceof the cam base 110 along a second direction (left and right direction,arrow B in the drawing) perpendicular to the first direction on the rearside of the base inclined surface 111 have.

Furthermore, the cam base 110 may be provided with accessory elementssuch as various brackets, plates, housings, covers, and collars formounting the following components. However, since the above-describedaccessory elements are for installing the constituent elements on thecam base 110, the aforementioned accessory elements are collectivelyreferred to as the cam base 110 except for exceptional cases in variousexemplary embodiments of the present invention.

In various exemplary embodiments of the present invention, the first camslide 210 is provided on the base inclined surface 111 of the cam base110 to slide forwards and backwards along a first direction thereof.

The first cam slide 210 is provided in a sliding block type having bothside surfaces while forming a vertical surface on the front sidethereof. The first cam slide 210 includes at least one driven cam plate211 corresponding to a cam drive 610 to be described later. The drivencam plate 211 is provided in plural, and is provided on the first camslide 210 to be inclined downwardly from the front to the rear.

In various exemplary embodiments of the present invention, a guide meansfor moving the first cam slide 210 forwards and backwards slide alongthe first direction through the base inclined surface 111 of the cambase 110 is included.

As shown in FIG. 6, the guide means includes a main rail block 121 and asub rail block 131 provided on the cam base 110, and a first guide plate221 provided on the first cam slide 210.

The main rail block 121 is fixed on the base inclined surface 111. Themain rail block 121 is disposed to be inclined downwardly from the rearto the front side in the first direction thereof. The main rail blocks121 are provided in one or a pair, and are slidably coupled to the lowersurface of the first cam slide 210.

The sub rail blocks 131 are provided in a pair, and are fixed on thebase inclined surface 111 with the main rail block 121 interposedtherebetween. The sub rail block 131 is disposed on the base inclinedsurface 111 to be inclined downwardly from the rear to the front side inthe first direction thereof. The sub rail block 131 is slidably coupledto the lower surface of the first cam slide 210.

Furthermore, the first guide plate 221 is fixed on both sides of thefirst cam slide 210, respectively. The first guide plate 221 is providedto be in surface-contact with the first guide blocks 141 provided onboth sides of the cam base 110.

Furthermore, the first cam slide 210 further includes a first returnsupport block 231 fixed on one side thereof, as shown in FIGS. 7A and7B. The first return support block 231 is configured to support thereturn movement of the first cam slide 210 with respect to the cam drive610 to be described later.

The first return support block 231 is fastened to one side of the firstcam slide 210. A support protrusion 233 slidably coupled to the camdrive 610 is formed at an upper end portion of the first return supportblock 231.

In various exemplary embodiments of the present invention, the returnspring unit 310 is for returning the first cam slide 210 slid to thefront side to its original position. The return spring unit 310 isconnected to the front side of the cam base 110 and the front side ofthe first cam slide 210 in a first direction, as shown in FIG. 8.

The return spring unit 310 may include a gas spring 311. The gas spring311 is located between the internal side of the cylinder connected tothe front side of the cam base 110 and the internal side of anothercylinder connected to the front side of the first cam slide 210.Furthermore, it has a gas spring structure of a known technology inwhich these cylinders are connected in a slip manner.

In various exemplary embodiments of the present invention, the returnstopper 410 is for limiting the return position of the first cam slide210, as shown in FIG. 9, and is located on the rear side of the cam base110 in correspondence with the first cam slide 210. Provided.

The return stopper 410 includes a buffer protrusion 411 for buffering animpact with the first cam slide 210. For example, the buffer protrusion411 may be fixed to the stopper block 431 in a form of a block made of arubber material, and may be provided to be flowable to the stopper block431 through a separate spring.

Referring to FIG. 1 to FIG. 5, in various exemplary embodiments of thepresent invention, the first punch unit 510 is for processing a piercinghole in a set portion of the panel material 1 by sliding the first camslide 210 in the first direction thereof.

The first punch unit 510 is fixed on the first cam slide 210 along afirst direction thereof. The first punch unit 510 includes a pluralityof pierce tools 511 provided on the front surface of the first cam slide210. The pierce tools 511 are provided on the front surface of the firstcam slide 210 to be spaced apart at a predetermined interval along thesecond direction thereof.

Referring to FIG. 1 to FIG. 5, in various exemplary embodiments of thepresent invention, the cam drive 610 is for providing a cam drivingforce to the first cam slide 210 to enable the slide movement of thefirst cam slide 210.

The cam drive 610 is provided to be fixed to the upper mold 5 of thepress mold system corresponding to the first cam slide 210. The camdrive 610 is provided to be in cam contact with the driven cam plate 211of the first cam slide 210.

The cam drive 610 includes a driving cam plate 611, a second guide plate621, and a second return support block 631 (see FIGS. 7A and 7B below).

The driving cam plate 611 is provided below the cam drive 610 to allowcam (slip) contact with the driven cam plate 211 of the first cam slide210.

The second guide plate 621 is provided on the rear surface of the camdrive 610 as shown in FIGS. 10A and 10B. The second guide plate 621 isprovided to be in surface-contact with the second guide block 151provided on the rear side of the cam base 110. The second guide plate621 is configured to guide the cam drive 610 in the vertical directionthrough the second guide block 151.

Furthermore, the second return support block 631 is provided on a sidesurface of the cam drive 610 corresponding to the first return supportblock 231 of the first cam slide 210. The second return support block631 is slidably coupled to the first return support block 231.

Here, the second return support block 631 supports the return movementof the first cam slide 210 and is slidably coupled with the supportprotrusion 233 of the first return support block 231. The second returnsupport block 631 assists the return movement of the first cam slide 210while pulling the first return support block 231 of the first cam slide210 when the cam drive 610 rises. Giving plays a role.

Referring to FIG. 1 to FIG. 5, in various exemplary embodiments of thepresent invention, the second cam slide 710 makes cam contact with thecam base 110 side by the movement (drive) of the cam drive 610, andslides forwards and backwards along a second direction perpendicular tothe first direction thereof.

The second cam slide 710 has a block shape and is provided to beslidably moved to the rear side of the cam drive 610. To this end, thecam drive 610 includes a guide rail member 641.

The guide rail member 641 guides the slide movement of the second camslide 710. The guide rail member 641 is slidably coupled with the secondcam slide 710 at the rear side of the cam drive 610 as shown in FIG. 11and is provided to be inclined downwardly from one side to the otherside along the second direction thereof.

The guide rail member 641 includes a fixed end portion 643 formed at oneend portion and the other end portion thereof, and a guide stopper 645formed at the fixing end portion 643 at the one end portion thereof.

The fixing end portion 643 is fixed to one side and the other side fromthe rear side of the cam drive 610, respectively. Here, the second camslide 710 slides between the fixed end portions 643 along the guide railmember 641, and forms a coupling hole 711 which is slidably coupled withthe guide rail member 641.

The guide stopper 645 limits the forward position of the second camslide 710 and is integrally formed with the fixed end portion 643 at oneend portion of the guide rail member 641.

Here, when the cam drive 610 is positioned above the first cam slide210, the second cam slide 710 is in a state of being moved downwards(reverse) along the guide rail member 641 in the other direction of thecam drive 610.

Furthermore, when the cam drive 610 moves downward and comes into camcontact with the first cam slide 210, the second cam slide 710 followsthe guide rail member 641 on one side of the cam drive 610 It movesupward (forward) in the direction thereof, and the guide stopper 645 iscaught.

Referring to FIG. 1 to FIG. 5, in various exemplary embodiments of thepresent invention, the second punch unit 810 is for processing apiercing hole in a set portion of the panel material 1 by sliding thesecond cam slide 710 along the second direction thereof.

The second punch unit 810 is fixed on the second cam slide 710 in asecond direction as a single number. The second punch unit 810 includesa pierce tool 811 provided on the side of the second cam slide 710.

Referring to FIG. 1 to referring to FIG. 5, in various exemplaryembodiments of the present invention, the cam block 910 selectivelymakes cam contact with the second cam slide 710 by vertical movement ofthe cam drive 610, and moves the second cam slide 710 forward andbackward slide in the second direction thereof.

The cam block 910 is fixed on the upper surface of the cam base 110, andis disposed on the horizontal base surface 113 of the cam base 110 alongthe second direction thereof. The cam block 910 has a cam inclinedsurface 911 inclined downward along the advancing direction of thesecond cam slide 710, and is slidably coupled to a lower surface of thesecond cam slide 710. Accordingly, a cam groove 721 is formed on a lowersurface of the second cam slide 710 to slide with the cam block 910 andcontact with the cam.

Furthermore, as shown in FIGS. 12A and 12B, the cam block 910 forms aguide groove 921 along the second direction thereof. Furthermore, aguide protrusion 731 slidably coupled with a guide groove 921 isintegrally provided at a lower portion of the second cam slide 710.

The guide protrusion 731 is configured to assist the return movement ofthe second cam slide 710 while pulling the second cam slide 710 throughthe guide groove 921 when the cam drive 610 rises.

Hereinafter, the operation of the multi-directional multi-cam type pressdevice 100 according to various exemplary embodiments of the presentinvention configured as described above will be described in detail withreference to the previously included drawings and the accompanyingdrawings.

FIG. 13 and FIG. 14 are views for explaining the operation of themulti-directional multi-cam type press device according to variousexemplary embodiments of the present invention.

Referring to FIG. 13 and FIG. 14, first, in various exemplaryembodiments of the present invention, the upper mold 5 is in a state ofbeing moved upward relative to the lower mold 3. Accordingly, the camdrive 610 is in a state of being moved upward with respect to the firstcam slide 210 on the cam base 110.

Here, the first cam slide 210 moves upward and backward together withthe first punch unit 510 along the first direction through the main railblock 121, the sub rail block 131 and the first guide plate 221.

In the instant case, the first cam slide 210 is elastically supported bythe cam base 110 by the return spring unit 310 and is in close contactwith the return stopper 410.

Furthermore, as the cam drive 610 is positioned above the first camslide 210, the second cam slide 710 is moved backward and downward alongthe guide rail member 641.

In the state as described above, in the exemplary embodiment of thepresent invention, the upper mold 5 is moved downwards relative to thelower mold 3, and the panel material 1 is molded into a set shape. Inthe present process, in the exemplary embodiment of the presentinvention, as in the drawings included above, the cam drive 610 alsomoves in a downward direction together with the upper mold 5. Here, thecam drive 610 is guided downward along the second guide block 151 of thecam base 110 through the second guide plate 621.

Accordingly, the cam drive 610 makes cam contact with the driven camplate 211 of the first cam slide 210 through the driving cam plate 611.Accordingly, the cam drive 610 moves the first cam slide 210 forward anddownward along with the first punch unit 510 along the first directionthereof.

Here, the first cam slide 210 slides forward along the first directionwhile overcoming the elastic force of the return spring unit 310 throughthe main rail block 121, the sub rail block 131 and the first guideplate 221.

During the present process, as the cam drive 610 descends, the secondcam slide 710 comes into cam contact with the cam inclined surface 911of the cam block 910 through the cam groove 721 on the lower surface.Accordingly, the second cam slide 710 moves upwardly and forward alongthe guide rail member 641 and is engaged with the guide stopper 645.

In the above process, the second cam slide 710 moves downward along thesecond direction along with the second punch unit 810 through the camblock 910.

Accordingly, in various exemplary embodiments of the present invention,a piercing hole in the first direction is processed in the panelmaterial 1 through the pierce tool 511 of the first punch unit 510 whilegoing through a series of processes as described above. Furthermore, invarious exemplary embodiments of the present invention, a piercing holein the second direction may be processed in the panel material 1 throughthe pierce tool 811 of the second punch unit 810.

On the other hand, in the state where the piercing hole is processed inthe set portion of the panel material 1 as above, when the upper mold 5moves upward with respect to the lower mold 3, the cam drive 610 alsomoves upwards.

Accordingly, in various exemplary embodiments of the present invention,the first cam slide 210 returns to its original position while movingbackward by the elastic force of the return spring unit 310.Furthermore, in various exemplary embodiments of the present invention,the second cam slide 710 is returned to its original position whilemoving backward by an elastic force of a spring not shown in thedrawing.

In the multi-directional multi-cam press device 100 according to variousexemplary embodiments of the present invention as described so far, thecam base 110 is provided with a first cam slide 210, and the cam drive610 is provided with a second cam slide 710 moving in a directiondifferent from that of the first cam slide 210.

Accordingly, in various exemplary embodiments of the present invention,the first and second cam slides 710 are moved in different directions bydriving a single cam by the cam drive 610, and piercing holes are formedin the panel material 1 in different directions.

Thus, according to the exemplary embodiments of the present invention,since piercing processing in different directions is possible evenwithin the narrow structural space of the press mold without processdivision, the space constraint condition of the press mold may beovercome, and the mold manufacturing cost and process time may beshortened.

Furthermore, in various exemplary embodiments of the present invention,the cam driving force of the cam drive 610 may be directly transmittedto the first and second cam slides 210 and 710 without passing through aseparate medium slide. Therefore, the driving distance of the cam slides210 and 710 may be sufficiently secured without interference between thecam slides 210 and 710.

For convenience in explanation and accurate definition in the appendedclaims, the terms “upper”, “lower”, “inner”, “outer”, “up”, “down”,“upwards”, “downwards”, “front”, “rear”, “back”, “inside”, “outside”,“inwardly”, “outwardly”, “interior”, “exterior”, “internal”, “external”,“inner”, “outer”, “forwards”, and “backwards” are used to describefeatures of the exemplary embodiments with reference to the positions ofsuch features as displayed in the figures. It will be further understoodthat the term “connect” or its derivatives refer both to direct andindirect connection.

The foregoing descriptions of specific exemplary embodiments of thepresent invention have been presented for purposes of illustration anddescription. They are not intended to be exhaustive or to limit thepresent invention to the precise forms disclosed, and obviously manymodifications and variations are possible in light of the aboveteachings. The exemplary embodiments were chosen and described toexplain certain principles of the present invention and their practicalapplication, to enable others skilled in the art to make and utilizevarious exemplary embodiments of the present invention, as well asvarious alternatives and modifications thereof. It is intended that thescope of the present invention be defined by the Claims appended heretoand their equivalents.

What is claimed is:
 1. A multi-directional multi-cam press device,including: a cam base fixed to a lower mold; a first cam slide providedto slide forwards and backwards along a first direction of the cam base;at least a first punch unit provided in the first cam slide along thefirst direction; a cam drive fixed to an upper mold configured formoving in a vertical direction with respect to the lower mold, andmaking a contact with the first cam slide; a second cam slide providedin the cam drive to move forwards and backwards in a second directionperpendicular to the first direction and in contact with a side of thecam base; and at least a second punch unit provided on the second camslide along the second direction.
 2. The multi-directional multi-campress device of claim 1, further including: a return spring unitconnected to the cam base and the first cam slide in the firstdirection.
 3. The multi-directional multi-cam press device of claim 2,wherein the return spring unit includes a gas spring.
 4. Themulti-directional multi-cam press device of claim 2, further including:a return stopper provided on the cam base corresponding to the first camslide and configured to limit a return position of the first cam slide.5. The multi-directional multi-cam press device of claim 1, wherein thecam base includes at least one main rail block which is mounted to beinclined downwardly from a rear side to a front side through a baseinclined surface as an upper surface, and is slidably coupled with thefirst cam slide.
 6. The multi-directional multi-cam press device ofclaim 5, wherein the cam base includes a pair of sub-rail blocksprovided on the base inclined surface with the main rail blockinterposed therebetween, and slidably coupled with the first cam slide.7. The multi-directional multi-cam press device of claim 1, wherein thefirst cam slide includes at least a driven cam plate mounted to beinclined downwardly from a front to a rear corresponding to the camdrive.
 8. The multi-directional multi-cam press device of claim 7,wherein the first cam slide includes a first guide plate fixed on oneside surface and another side surface of the first cam slide andprovided to be in contact with a first guide block provided on a firstside and a second side of the cam base.
 9. The multi-directionalmulti-cam press device of claim 7, wherein the cam drive includes adriving cam plate provided to be in contact with the at least a drivencam plate.
 10. The multi-directional multi-cam press device of claim 1,wherein the first cam slide includes a first return support block fixedon at least one side thereof and slidably coupled to the cam drive. 11.The multi-directional multi-cam press device of claim 10, wherein thecam drive includes a second return support block provided on a sidesurface corresponding to the first return support block and slidablycoupled with the first return support block.
 12. The multi-directionalmulti-cam press device of claim 1, wherein the cam drive includes asecond guide plate provided on a rear surface thereof and provided incontact with a second guide block provided on a rear side of the cambase.
 13. The multi-directional multi-cam press device of claim 1,wherein the cam drive includes a guide rail member which is provided tobe inclined downwardly from one side to another side along the seconddirection from a rear side thereof and slidably couples with the secondcam slide.
 14. The multi-directional multi-cam press device of claim 13,wherein the guide rail member includes: first and second fixed endportions formed at one end portion and at another end portion of theguide rail member and fixed to a first side and a second side of the camdrive, respectively, and a guide stopper formed at the fixed end portionof the one end portion and limiting a forward position of the second camslide.
 15. The multi-directional multi-cam press device of claim 14,wherein the second cam slide has an engaging hole slidably coupled withthe guide rail member, and slides between the first and second fixed endportions along the guide rail member.
 16. The multi-directionalmulti-cam press device of claim 1, further including: a cam blockprovided on a base horizontal surface of an upper surface of the cambase, having a cam inclined surface inclined downwardly along the seconddirection of the second cam slide, and slidably coupled to a lowersurface of the second cam slide.
 17. The multi-directional multi-campress device of claim 16, wherein on the lower surface of the second camslide, a cam groove for contacting with the cam block is formed.
 18. Themulti-directional multi-cam press device of claim 16, wherein a guidegroove is formed in the cam block along the second direction, andwherein a guide protrusion slidably coupled to the guide groove isprovided at a lower portion of the second cam slide.
 19. Themulti-directional multi-cam press device of claim 1, wherein the atleast a first punch unit and the at least a second punch unit include apierce tool for piercing a panel material.